Filler cap



C. E. TURNER FILLER CAP July 5, 1932.

Filed Nov. 25, 1929 gwuankoc Patented July 5, 1932' UNITED STATES rarer OFFICE v CHARLES E. TURNER, OF WATERBURY, CONNECTICUT, ASSIGNOR TO BRIDGEPORT-BRASU COMPANY, OF BRIDGEPOBT, CONNECTICUT rrztrna can Application filed November 25, 1929. herlal No. 403,568.

This invention relates to filler caps such as used on automobile radiators, gasoline tanks or the like and it has particular reference to caps of a type in which an inner 6 body, which is relatively heavy and made of inexpensive metal, is covered exteriorly with a relatively thin shell of non-corrosive metal such as brass.

One of the objects of this invention is to 0 provide a filler cap of this. character which will be of neat appearance, efficient in use, and which can be readily and inexpensively manufactured.

Another object is to provide an improved 15 means for and method of securing the outer covering firmly and permanently to the inher body To these and other ends the invention consists in the novel features and steps andcombinations of parts to be hereinafter described and claimed.

in the accompanying drawing: Fig. 1 is a top view of a filler cap embodying the features of my invention; pg Fig. 2 is a section on line 22 of Fig. 1; Fig. 3 is a top plan view of a cap of slightly modified form;

Fig. 4 is a section on linel- 4 of Fig. 3 and Fig. 5 is a fraentary view on a larger scale of the cap shown in Fig. 4.

The filler caps illustrated in the drawing ar composed of two principal parts, i. e., a cup-shaped inner body that is adapted to screw upon the end of a filler tube, and a cup-shaped outer covering or shell applied to the exterior surface of the body. The body of the cap shown in Figs. 1 and 2 is preferably made of heavy 'auge sheet metal and is provided with threads 11 formed upon the inner surface of its side wall 12. The top wall of this body is indicated at 13, and it will be noted that this top wall is bulged outwardly-in the preferred form to present a slight crown, as indicated at 15. Prefer ably this crown does not extend completely to the periphery of the body, the top wall at the peripheral portion being substantially at ri ht angles to the side wal he outer covering or shell 16 is preferably so made of non-corrosive sheet metal such as all brass, the sheet being thinner than that employed in the construction of the body. The outer shell is provided with a side wall 17 that extends axially somewhat beyond the edge of the body 10 so as to overlap the filler tube 14 to some extent when the cap is in the closed position, as shown in Fig. 2. In this extended portion of the outer shell an exterior head 18 is preferabl provided. Adjacent the inner edge of the ody 10 the outer shell engages the outer surface thereof, and farther in the direction of the body top the outer shell is bulged outwardly at peripherall spaced points so as to be out of contact wit the body and present a number of lugs (preferably but not necessarily of somewhat rounded angular shape) which facilitate the gripping of the cap for screwing to and unscrewing it from the filler tube. At points between the lugs 19 the side wall of the outer shell contacts with the side wall of the body. The top wall of the outer shell, as will be noted, conforms closely to the topwall of the body, contacting therewith over substantially the entire area of the top portion of'the cap.

In order to permanently secure the outer shell to the body so that relative angular movement of the two parts is impossible even under heavy strains, the top of the body and the top of the shell are firmly fastened together. For this purpose there is a connection between the opposing faces of the top walls of those members which is preferably brought about by. fastening those faces together by use of solder or the like. In the preferred method of manufacture, indentations or depressions 21 are formed adjacent the contacting surfaces of the two members to hold pieces of solder, these indentations being located at peripherally spaced points. In the cases illustrated the indentations are formed in the material of the body 10, which is sufliciently 'thick for this purpose, and

these indentations or depressions are substano tially rectangular in shape. They should preferably be of suiiicient cubical dimension to receive a sufficient supply of solder or other suitable connecting material to securely interconnect the opposing faces of the parts.

60 stantially A suflicient supply of solder for this purpose will preferably be of greater cubical dimen sion than the cubical dimension of the respective indentation, so that sufiicient solder will I, be available to flow between the surfaces adjacent each indentation and also fill each indentation.

In making the cap the preferred procedure is to place pieces of solder-of proper size 10 in depressions formed in the top of the body 10 and then to insert the body into the outer shell. Heat is then applied to melt the solder and cause it to flow, and pressure is applied to force the parts together, whereby 16 the solder will fill the depression and flow betweeen the closely adjacent surfaces of the two members over substantially large areas. Upon cooling the parts will be found to be secured together in a very effective manner.

In some cases it is desirable to provide the filler cap with a suitable vent, and in this case-the cap is preferably of the form shown in Figs.- 3, 4 and 5. In-this case the outer shell is in all respects similar to shell 16.

and the inner body 31 has threads 32 formed in its side wall 33, as before, the top wall of the body. being disposed substantially at right angles to the side wall adjacentthe periphery, as shown at 34. In the crowned top wall portion 35 of the .body, solder-holding indentations 36 similar to those previ-.

ously described are provided, In this form of cap, the top wall 35 at its central portion is cup (1 inwardly to forma cavity or pocket 37, w 'ch in this case is bulged away from the opposing surface of the outer shell, as

accuse fication and variation within the scope of the appended What I claim is: l

1. A filler cap com rising an inner body of inverted cup form having depressions in the outer surface of its top wall for holding solder, said depressions being located adjacent theperiphery of thm body top and spaced at intervals from eachother, an outer s ell having a top wall overlying said depressions, and a body of solder larger than each depression in each depression and melted and pressed to dispose it between the adjacent faces of said top walls to secure them to ether.

2. A er cap or similar article comprisinga cup-shaped bod of metal having a top portion, a cup-sha cover of metal having a top portion in which said body is in telescoped relationwith the top portions of both adjacent each other, one of said top portions having depressions formed therein, and a body of meltable material, such as solder, of

ater cubical dimension than the cubical ension of each of the depressions disposed in each depression and betweeen the surfaces of said body and cover to secure said parts together.

In witness whereof, I have hereunto set my hand this 20th da of November, 1929.

' (ELK-LES E. TURNER.

shown in Fig. 4. In the bottom of the cavity 37 is a venting perforation 38 communicating with the interior of the filler tube 39. In

40 communication with the cavity 37 and leading fromthe same toward and over the periphery of the body 31 are grooves 40 formed by depressions in the upper face of the body. Connected with the grooves -10 and forming a continuation thereof are grooves 41 formed by depressions in the side wall 33 of the body at its outer surface. These grooves" 41 are in communication with the atmosphere without the filler tube 39 at the inner edge of the side wall as and beneath the side wall 42 of the outer shell 30.

The provision of indentations in one of the parts for receiving material adapted to interconnect the parts under the effects. of

heat and pressure facilitates 'to a considerable extent the process of making filler cape of this type. By the method employed, the cost of producing caps of this type is subredueed and a more eificient cap of very neat appearance is provided.

While I have shown and described two embodiments of my invention, it is to be un-" derstood that it not be limited to all. .5 of the details shown but is capable of modi- 

